<template>

  <div class="app-container">
    <!-- 标题 -->
    <h2 style="text-align: center;">发布新课程</h2>
    <el-steps :active="3" process-status="wait" align-center style="margin-bottom: 40px;">
      <el-step title="填写课程基本信息"/>
      <el-step title="创建课程大纲"/>
      <el-step title="最终发布"/>
    </el-steps>

    <!-- 课程信息显示 -->
    <div class="ccInfo">
      <img :src="coursePublish.cover">
      <div class="main">
        <h2>{{ coursePublish.title }}</h2>
        <p class="gray"><span>共{{ coursePublish.lessonNum }}课时</span></p>
        <p><span>所属分类：{{ coursePublish.subjectLevelOne }} — {{ coursePublish.subjectLevelTwo }}</span></p>
        <p>课程讲师：{{ coursePublish.teacherName }}</p>
        <h3 class="red">￥{{ coursePublish.price }}</h3>
      </div>
    </div>

    <!-- 上一步和发布的按钮 -->
    <div>    
        <el-button @click="previous">返回修改</el-button>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="publish">发布课程</el-button>
    </div>
  </div>
</template>

<script>
import course from '@/api/edu/course'
export default {

  data() {
    return {
      saveBtnDisabled: false, // 保存按钮是否禁用
      courseId:'',
      coursePublish:{}
    }
  },

  created() {
    //通过路由获取课程id
    if(this.$route.params && this.$route.params.id){
      this.courseId = this.$route.params.id
      //调用接口方法根据id查询课程
      this.getPublishCourseInfo()
    }
  },

  methods: {
    
    //根据id查询课程
    getPublishCourseInfo(){
      course.getPublishCourseInfo(this.courseId)
        .then(response=>{
          this.coursePublish = response.data.publishCourseInfo
        })
    },
    //上一步
    previous() {
     
      this.$router.push({ path: '/course/chapter/1' })
    },
    //最终发布
    publish() {
      course.publishCourse(this.courseId)
        .then(response=>{
          //提示
          this.$message({
            type:'success',
            message:'课程发布成功！'
          })
          //跳转课程列表页面
          this.$router.push({ path: '/course/list' })
        })  
    }
  }
}
</script>

<style scoped>
  .ccInfo {
      background: #f5f5f5;
      padding: 20px;
      overflow: hidden;
      border: 1px dashed #DDD;
      margin-bottom: 40px;
      position: relative;
  }
  .ccInfo img {
      background: #d6d6d6;
      width: 300px;
      height: 300px;
      display: block;
      float: left;
      border: none;
  }
  .ccInfo .main {
      margin-left: 400px;
  }

  .ccInfo .main h2 {
      font-size: 28px;
      margin-bottom: 30px;
      line-height: 1;
      font-weight: normal;
  }
  .ccInfo .main p {
      margin-bottom: 10px;
      word-wrap: break-word;
      line-height: 24px;
      max-height: 48px;
      overflow: hidden;
  }

  .ccInfo .main p {
      margin-bottom: 10px;
      word-wrap: break-word;
      line-height: 24px;
      max-height: 48px;
      overflow: hidden;
  }
  .ccInfo .main h3 {
      left: 400px;
      bottom: 20px;
      line-height: 1;
      font-size: 28px;
      color: #d32f24;
      font-weight: normal;
      position: absolute;
  }
</style>